The Paul Butterfield Blues Band was an American blues and blues-rock band from Chicago. Formed in the summer of 1963, the group originally featured eponymous vocalist and harmonicist Paul Butterfield,
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bf7c789d4e09190c118f6cd5e23030da143183d326a1835eb9b34906bdf75a9. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/36c91552-b0c5-4f97-9f2b-0f499329bb5c.json and https://artists.proofprofile.net/proofs/artist/36c91552-b0c5-4f97-9f2b-0f499329bb5c.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x41f7d5a4ebdf0a96788bf7ec6a82eed5b1afdb952f9ba3a16cebc6168d81a9ea. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182569.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfbca9cfe910b5ed93b869a0ca27cf33a6c075d27355367334e6e916491a953ee. Chain 2 (Bitcoin): anchored in block 958300 (2026-07-16T16:14:30Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182570.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd529e987ba0d704a4f0cf0c84dfc6a8c6a34006dcc4a00f77e06ae296723e006. Chain 2 (Bitcoin): anchored in block 956856 (2026-07-06T01:25:57Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182572.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d1154be807105d479fe2d54ab44154c12d64282cefdfa851a6068e8e970fc70. Chain 2 (Bitcoin): anchored in block 956889 (2026-07-06T06:56:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182576.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe54f57b6a52989644afd7cb5d40c1377715f9e8511a4771fdfeb0019d2b97e8f. Chain 2 (Bitcoin): anchored in block 959128 (2026-07-22T12:33:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182581.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9bedf3ac41697f523da36a6ca1cd0ecf0be414605a45580c6e58657dbba9d0a2. Chain 2 (Bitcoin): anchored in block 957550 (2026-07-11T09:54:43Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182575.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8f718b1c1eda302d1ba8a11238a4e6a8031ca3a925fd07057a91d26239551617. Chain 2 (Bitcoin): anchored in block 958194 (2026-07-15T20:32:27Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182578.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6dd816ecc1847a88b5df4e7bb2d373b46782a54685b506e82c9a23d99a602b89. Chain 2 (Bitcoin): anchored in block 958779 (2026-07-19T21:08:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182580.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa90156790b3e2e391e53436d4221e19866373b5c1edcff5dff9d072818fd40dd. Chain 2 (Bitcoin): anchored in block 958153 (2026-07-15T12:03:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEA28900097.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x054485469bf791db6b667d6f383bc5481df3038a1f776f1061fd063645d6a061. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEA28900098.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x742578eb3c7957d9e1d205874e5ae170927943433d3b8087c33640ce3d1b602e. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEA28900099.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x074d4f1a73297f9e23c2dfd74be9d4f5097d2afdfb32a2b9f7fa90c1d7952425. Chain 2 (Bitcoin): anchored in block 958473 (2026-07-18T00:52:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEA28900101.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4f6d2af9e7cd91a9b6d1417c48a349e9b4cf729eee32097ee578800694a6530b. Chain 2 (Bitcoin): anchored in block 958917 (2026-07-20T17:53:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE16800012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb706ba1f75630300acc5ed4e48c972b7ef0e47b46773e43f19baecfad51fbfbd. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T17:49:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10412612.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdb0d6a3a67a0f8119bdc4c2bdd715967f12fe810af103fbc9012493b5e69c3dd. Chain 2 (Bitcoin): anchored in block 958977 (2026-07-21T06:27:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10250117.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5a5bca7e850a670e736540033e70f781fe69ec44a810714808bcbc9e53a2e31d. Chain 2 (Bitcoin): anchored in block 958234 (2026-07-16T03:46:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE16800016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4fa7092c013881c963b60a08350da5876cc1d38a2551f7574dce7693a0ad1de6. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10250120.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8223f7e112ec0560adf50431097a6e6ffa502862b3e9a03691c5b211f6b98506. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE16900011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x695e8184fc1181ed2e0cca5ca8da37bb12b5faa5792f4cc60fe0c5b8371e3686. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10250125.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf0ce9bd33ef2cec181250be2e6e8fe30f67e1bec1db4b5dd262eac6bf448bd4e. Chain 2 (Bitcoin): anchored in block 958656 (2026-07-19T04:04:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10184002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcbd8768735ce0180e86a1af95369f8fc37dd4c32ffc5365ac04a1539a4cc149c. Chain 2 (Bitcoin): anchored in block 958340 (2026-07-17T00:53:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10184006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5d8cc9d16a2774978fc4caf795e5ad7d3f996d8f909f6e4bfcbd1374515086be. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10184008.
Everything Going to Be Alright - Live @ the Troubadour, Los Angeles
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x30c38d2300879119a8eabe89e3a760ed0e27e2f6e3f75c4db6bb79ba627cfb0a. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10412417.
Rhino Hi-Five - The Paul Butterfield Blues Band
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x11f9fd85fb8c04526a9296ae8dab64a3c9f1792ed0f548a950cf5ee5de3c49c5. Chain 2 (Bitcoin): anchored in block 957552 (2026-07-11T10:04:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE16900010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x389244ab854b0642fe28513b78e7fddae098e42b71e76dd8b96e19272e77287c. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10184007.
Got To Be Movin' On (Live Amsterdam '69)
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1584c6e41ed26fa63f78900cbd82f96e09b40602555c3467e678b8fd125dd37a. Chain 2 (Bitcoin): anchored in block 957043 (2026-07-07T13:52:39Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USEE10182560.
Iconic Performances from the Monterey International Pop Festival
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xda2f02cfd16caf06c154a5cc5918abf912c6a4cb198c8bf00038836f66969545. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QM4TX1798165.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c461ea67a91c2e10c344f86d5f1ee8350b21344b4e072f2d418c088720d31d7. Chain 2 (Bitcoin): anchored in block 953515 (2026-06-13T12:53:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUR19700517.